Another 360 question (or two)

On all pipe thread fittings I use loctite 565. You don’t even have to have full threads, just enough to hold the pipe or plug in. Works well on damaged threads. Will hold up to 300 psi for sure. Stuff is gooey and messy, but remains somewhat pliable after it is heat cycles. Does not dry rock hard. For the screw in studs into water jacket, I do not know.